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A solution contains 4.64g KCl in 178 mL of solution. The density of the KCl solution is 1.14 g/mL. What is the molarity, M, for the potassium chloride solution?
A sample of hydrogen gas occupies 15.8 L at STP. How many moles of the gas are present?
If an aluminum nitrate solution is added to a sodium fluoride solution the following equilibrium will be reached: Al3+(aq) + 6 F-(aq) mc035-1.jpg AlF63-(aq) For this equilibrium, K = 5.0 ´1023
A gas mixture consists of 320mg methane, 175mg of argon, and 225mg of neon. The partial pressure of neon at 300K is 8.87kPa. Calculate (a) the volume and (b) the total pressure of the mixture.
A 54.14 g sample of a substance is initially at 28.6 C. After absorbing 2631 J of heat, the temperataure of the substance is 179.1 C. What is the specific heat (c) of the substance
To make sure that the white powder was all sodium chloride and not mixed with sodium hydrogen carbonate, would you need to add a little less or little more hydrochloric acid to the reaction
In the reaction of sodium benzoate with hydrochloic ac to form benzoic acid, if 1.29 g of benzoic acid were formed, how many mmol of sodium
What is the percent by mass of a solution in which 60. g of NaOH are dissolved in sufficient water to make 100 g of solution.
What is the standard enthalpy of combustion of propene. Note that since this is the standard enthalpy, carbon dioxide will be gaseous and water will be a liquid.
Provided a mixture of three different compounds A, B and C to perform a chromatographic experiment using TLC. Separate experiments with the pure compounds showed the Rf values of A and B
Lead(II) phosphate, Pb3(PO4)2 (s), is allowed to come to equilibrium with its ions in otherwise pure water. Ksp = 3.0 x 10^44. Calculate the equilibrium concentration of each ion.
Potassium hydroxide is used to precipitate each of the cations from their respective solution. Determine the minimum concentration of {\rm KOH} required for precipitation to begin in each case.
Calculate the freezing point depression of a solution containing 0.20% wt/v glucose (mol wt of 180) and 0.5% NaCl
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